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• Dreamcast Operating Systems

  16 septembre 2010, par Multimedia Mike — Sega Dreamcast

  The Sega Dreamcast was famously emblazoned with a logo proudly announcing that it was compatible with Windows CE :

  
  
  

  It’s quite confusing. The console certainly doesn’t boot into some version of Windows to launch games. Apparently, there was a special version of CE developed for the DC and game companies had the option to leverage it. I do recall that some game startup screens would similarly advertise Windows CE.

  Once the homebrew community got ahold of the device, the sky was the limit. I think NetBSD was the first alternative OS to support the Dreamcast. Meanwhile, I have recollections of DC Linux and LinuxDC projects along with more generic Linux-SH and SH-Linux projects.

  
  
  

  DC Evolution hosts a disc image available for download with an unofficial version of DC Linux, assembled by one Adrian O’Grady. I figured out how to burn the disc (burning DC discs is a blog post of its own) and got it working in the console.

  It’s possible to log in directly via the physical keyboard or through a serial terminal provided that you have a coder’s cable. That reminds me– my local Fry’s had a selection of USB-to-serial cables. I think this is another area that is sufficiently commoditized that just about any cable ought to work with Linux out of the box. Or maybe I’m just extrapolating from the experience of having the cheapest cable in the selection (made by io connect) plug and play with Linux.

  
  
  

  Look ! No messy converter box in the middle as in the Belkin case. The reason I went with this cable is that the packaging claimed it was capable of up to 500 Kbits/sec. Most of the cables advertised a max of 115200 bps. I distinctly recall being able to use the DC coder’s cable at 230400 bps a long time ago. Alas, 115200 seems to be the speed limit, even with this new USB cable.

  Anyway, the distribution is based on a 2.4.5 kernel circa 2001. I tried to make PPP work over the serial cable but the kernel doesn’t have support. If you’re interested, here is some basic information about the machine from Linux’s perspective, gleaned from some simple commands. This helps remind us of a simpler time when Linux was able to run comfortably on a computer with 16 MB of RAM.

  Debian GNU/Linux testing/unstable dreamcast ttsc/1
  dreamcast login : root
  
  Linux dreamcast 2.4.5 #27 Thu May 31 07:06:51 JST 2001 sh4 unknown
  Most of the programs included with the Debian GNU/Linux system are
  
  freely redistributable ; the exact distribution terms for each program
  
  are described in the individual files in /usr/share/doc/*/copyright
  Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
  
  permitted by applicable law.
  dreamcast : # uname -a
  
  Linux dreamcast 2.4.5 #27 Thu May 31 07:06:51 JST 2001 sh4 unknown
  dreamcast : # cat /proc/cpuinfo 
  
  cpu family : SH-4
  
  cache size : 8K-byte/16K-byte
  
  bogomips : 199.47
  Machine : dreamcast
  
  CPU clock : 200.00MHz
  
  Bus clock : 100.00MHz
  
  Peripheral module clock : 50.00MHz
  dreamcast : # top -b
   09:14:54 up 14 min,  1 user,  load average : 0.04, 0.03, 0.03
  
  15 processes : 14 sleeping, 1 running, 0 zombie, 0 stopped
  
  CPU states :   1.1% user,   5.8% system,   0.0% nice,  93.1% idle
  
  Mem :     14616K total,    11316K used,     3300K free,     2296K buffers
  
  Swap :        0K total,        0K used,        0K free,     5556K cached
    PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  
    219 root      18   0  1072 1068   868 R     5.6  7.3   0:00 top
  
      1 root       9   0   596  596   512 S     0.0  4.0   0:01 init
  
      2 root       9   0     0    0     0 SW    0.0  0.0   0:00 keventd
  
      3 root       9   0     0    0     0 SW    0.0  0.0   0:00 kswapd
  
      4 root       9   0     0    0     0 SW    0.0  0.0   0:00 kreclaimd
  
      5 root       9   0     0    0     0 SW    0.0  0.0   0:00 bdflush
  
      6 root       9   0     0    0     0 SW    0.0  0.0   0:00 kupdated
  
      7 root       9   0     0    0     0 SW    0.0  0.0   0:00 kmapled
  
     39 root       9   0   900  900   668 S     0.0  6.1   0:00 devfsd
  
     91 root       8   0   652  652   556 S     0.0  4.4   0:00 pump
  
     96 daemon     9   0   524  524   420 S     0.0  3.5   0:00 portmap
  
    149 root       9   0   944  944   796 S     0.0  6.4   0:00 syslogd
  
    152 root       9   0   604  604   456 S     0.0  4.1   0:00 klogd
  
    187 root       9   0   540  540   456 S     0.0  3.6   0:00 getty
  
    201 root       9   0  1380 1376  1112 S     0.0  9.4   0:01 bash
  

  Note that at this point I had shutdown both gpm and inetd. The rest of the processes, save for bash, are default. The above stats only report about 14 MB of RAM ; where are the other 2 MB ?

  dreamcast : # df -h
  Filesystem            Size  Used Avail Use% Mounted on
  /dev/rd/1             2.0M  560k  1.4M  28% /
  

• FFmpeg record and stream

  16 janvier 2019, par Robert

  I’m getting the following error.

     E/FFmpeg: Exception while trying to run: 
  
     [/data/user/0/com.example.pathways.testipcam/files/ffmpeg, -y, -i, 
  
    rtsp://log:pass@IP:port/video.h264, -acodec, copy, -vcodec, copy, -t, 
  
  00:03:00, 
  
   content://com.example.android.fileprovider/external_files/Android/data/com.example.pathways.testipcam/files/Movies/IPcam_20190116_150628_6019720208966811003.m>kv]
  
  java.io.IOException: Cannot run program "/data/user/0/com.example.pathways.testipcam/files/ffmpeg": error=2, No such >file or directory

  OK I’m trying to learn how to record and stream my IP cam on android. I can stream the video in a surface view media player no problem so I then went to the record task. Now I’m a bit lost. I know this is possible as I have read people say they used this to do it.

  I started with implamenting

   implementation 'nl.bravobit:android-ffmpeg:1.1.5'

  But I can’t figure out what I am missing or doing wrong as there aren’t really any tutorials explaining this completely. So hopefully this can be the thread everyone else finds for a solution. I have listed my code below. Exactly what have I got wrong here. It runs and goes to onStart...then right on onFailure.
  DO I need to have 2 streams in order to view and watch ? or what the deal.
  I know FFmpeg can do that.
  "ffmpeg supports multiple outputs created out of the same input(s) in the same process. The usual way to accomplish this is :

  ffmpeg -i input1 -i input2 \
  -acodec … -vcodec … output1 \
  -acodec … -vcodec … output2 \"

  but I have no idea how to sue that.
  Anyway, I know I’m kind of close, at least I hope I need a little help on getting over the finish line on this. What have I done wrong, how does this work.

  Here is what I did, I streamed the video as the app does. no problem

      surfaceView = (SurfaceView) findViewById(R.id.videoView);
  
      _surfaceHolder = surfaceView.getHolder();
  
      _surfaceHolder.addCallback(this);
  
      _surfaceHolder.setFixedSize(320, 240);
  
  
  
   ....
  
  
  
   @Override
  
  public void surfaceCreated(SurfaceHolder holder) {
  
      mpPlayerRun();
  
  
  
  }
  
  
  
  public void mpPlayerRun(){
  
      _mediaPlayer = new MediaPlayer();
  
      _mediaPlayer.setDisplay(_surfaceHolder);
  
  
  
      try {
  
          // Specify the IP camera's URL and auth headers.
  
          _mediaPlayer.setDataSource(RTSP_URL);
  
  
  
          // Begin the process of setting up a video stream.
  
          _mediaPlayer.setOnPreparedListener(this);
  
          _mediaPlayer.prepareAsync();
  
      }
  
      catch (Exception e) {}
  
  }
  
  ...
  
   @Override
  
  public void onPrepared(MediaPlayer mp) {
  
      _mediaPlayer.start();
  
  }

  OK, so then I created a button to record.

  @Override
  
  public void onClick(View view) {
  
      switch (view.getId()) {
  
          case R.id.IPcamback:
  
              break;
  
  
  
          case R.id.IPcamrecord:
  
              if (ContextCompat.checkSelfPermission(this,
  
                      Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
  
                  takeIPvid();
  
              } else {
  
                  requestIPCamPermission();
  
              }

  .....

  requested permission then results.

      private void requestIPCamPermission() {
  
      if (ActivityCompat.shouldShowRequestPermissionRationale(this,
  
              Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
  
  
  
          new AlertDialog.Builder(this)
  
                  .setTitle("Permission needed")
  
                  .setMessage("This permission is needed do to android safety protocol")
  
                  .setPositiveButton("ok", new DialogInterface.OnClickListener() {
  
                      @Override
  
                      public void onClick(DialogInterface dialog, int which) {
  
                          ActivityCompat.requestPermissions(MainActivity.this,
  
                                  new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 420);
  
                      }
  
                  })
  
                  .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
  
                      @Override
  
                      public void onClick(DialogInterface dialog, int which) {
  
                          dialog.dismiss();
  
                      }
  
                  })
  
                  .create().show();
  
  
  
      } else {
  
          ActivityCompat.requestPermissions(this,
  
                  new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 420);
  
      }
  
  }
  
  
  
  @Override
  
  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  
  
  
      if (requestCode == 420)  {
  
          if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
  
              takeIPvid();
  
          } else {
  
              Toast.makeText(this, "Permission DENIED", Toast.LENGTH_SHORT).show();
  
          }
  
   .....

  then I made the file provider and createVideoOutputFile() method and the takeIPvid method.

  private File createVideoOutputFile() throws IOException {
  
      String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
  
      String imageFileName = "IPcam_" + timeStamp + "_";
  
      IPstorageDir = getExternalFilesDir(Environment.DIRECTORY_MOVIES);
  
      IPvideo_file = File.createTempFile(
  
              imageFileName,  /* prefix */
  
              ".mp4",         /* suffix */
  
              IPstorageDir      /* directory */
  
      );
  
  
  
      // Save a file: path for use with ACTION_VIEW intents
  
      String IPmVideoFilename = IPvideo_file.getAbsolutePath();
  
      return IPvideo_file;
  
  }
  
  
  
     private void takeIPvid() {
  
  
  
          File ipfile = null;
  
          try {
  
              ipfile = createVideoOutputFile();
  
          } catch (IOException e) {
  
              e.printStackTrace();
  
          }
  
      IPvideo_uri = FileProvider.getUriForFile(this,
  
              "com.example.android.fileprovider",
  
              ipfile);
  
  
  
  
  
      String[] cmd = {"-y", "-i", "rtsp://Login:Passord@IP:port/video.h264", "-acodec", "copy", "-vcodec", "copy","-t","00:00:20", IPvideo_uri.toString() };
  
  
  
      FFmpeg.getInstance(this).execute(cmd,new ExecuteBinaryResponseHandler(){
  
  
  
          @Override
  
          public void onStart() {
  
              super.onStart();
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
              super.onFailure(message);
  
  
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
              super.onSuccess(message);
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
              super.onProgress(message);
  
  
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
              super.onFinish();
  
  
  
          }
  
      });
  
  
  
  }

• My discord music bot works locally, but not on a server [closed]

  8 décembre 2022, par Asmondya

  I have an issue with my discord music bot that I made with discord.js v14.

  


  When I run it locally, it works fine and plays music as it should. But when I put in on a server (here I use Vultr), it doesn't work.

  


  I am not sure but it might come from FFmpeg. I am kinda desperate and cant really figure where the issue is from. I think it is FFmpeg because it is what converts the music.

  


  What happens :

  


  Me: !play a music
Bot: Now playing a music
*and right after, without playing the music*
Bot: Music finished


  


  What should normally happen is that same thing but the "music finished" should be sent when the queue is finished.

  


  The thing is that the bot works perfectly locally, but does this when it is hosted on a server. Also I don't have any error messages or else. It just doesn't play the music like if the music was 0 seconds length.

  


  I tried making sure everything is installed on the server, same as making sure ffmpeg was installed globally and I have the good version of it. Here is the answer I have to the "ffmpeg -version" command :enter image description here.

  


  Does anyone know what could be the issue or what could cause it ? I can show some code if needed, even tho it works perfectly fine locally.

  


  Here's my code :

  


  const { DisTube } = require('distube')
const Discord = require('discord.js')
const { EmbedBuilder } = require('discord.js')
const client = new Discord.Client({
  intents: [
    Discord.GatewayIntentBits.Guilds,
    Discord.GatewayIntentBits.GuildMessages,
    Discord.GatewayIntentBits.GuildVoiceStates,
    Discord.GatewayIntentBits.MessageContent,
  ]
})
const { ActivityType } = require('discord.js')
const fs = require('fs')
const dotenv = require("dotenv")
dotenv.config()
const { SpotifyPlugin } = require('@distube/spotify')
const { SoundCloudPlugin } = require('@distube/soundcloud')
const { YtDlpPlugin } = require('@distube/yt-dlp')

client.distube = new DisTube(client, {
  leaveOnStop: false,
  emitNewSongOnly: true,
  emitAddSongWhenCreatingQueue: false,
  emitAddListWhenCreatingQueue: false,
  plugins: [
    new SpotifyPlugin({
      emitEventsAfterFetching: true
    }),
    new SoundCloudPlugin(),
    new YtDlpPlugin()
  ]
})
client.commands = new Discord.Collection()
client.aliases = new Discord.Collection()

fs.readdir('./commands/', (err, files) => {
  if (err) return console.log('Could not find any commands!')
  const jsFiles = files.filter(f => f.split('.').pop() === 'js')
  if (jsFiles.length <= 0) return console.log('Could not find any commands!')
  jsFiles.forEach(file => {
    const cmd = require(`./commands/${file}`)
    console.log(`Loaded ${file}`)
    client.commands.set(cmd.name, cmd)
    if (cmd.aliases) cmd.aliases.forEach(alias => client.aliases.set(alias, cmd.name))
  })
})

client.on('ready', () => {
  console.log(`${client.user.tag} is ready to play music.`)
})

client.on('messageCreate', async message => {
  if (message.author.bot || !message.guild) return
  const prefix = "!"
  if (!message.content.startsWith(prefix)) return
  const args = message.content.slice(prefix.length).trim().split(/ +/g)
  const command = args.shift().toLowerCase()
  const cmd = client.commands.get(command) || client.commands.get(client.aliases.get(command))
  if (!cmd) return
  if (cmd.inVoiceChannel && !message.member.voice.channel) {
    return message.channel.send(`You must be in a voice channel!`)
  }
  try {
    cmd.run(client, message, args)
  } catch (e) {
    console.error(e)
    message.channel.send(`Error: \`${e}\``)
  }
})

// Add filters to the queue status :
// | Filter: \`${queue.filters.names.join(', ') || 'Off'}\` 

const status = queue =>
  `Volume: \`${queue.volume}%\` | Loop: \`${
    queue.repeatMode ? (queue.repeatMode === 2 ? 'All Queue' : 'This Song') : 'Off'
  }\` | Autoplay: \`${queue.autoplay ? 'On' : 'Off'}\``
client.distube
  .on('playSong', (queue, song) =>
    queue.textChannel.send({
      embeds: [
        new Discord.EmbedBuilder()
          .setTitle('Now playing')
          .setDescription(`\`${song.name}\` - \`${song.formattedDuration}\`\n${status(queue)}\n\nRequested by: \`${song.user.tag}\``)
          .setThumbnail(`${song.thumbnail}`)
      ]
    })
  )
  .on('addSong', (queue, song) =>
    queue.textChannel.send({
      embeds: [
        new Discord.EmbedBuilder()
          .setTitle('Song added to the queue')
          .setDescription(`${song.name} - \`${song.formattedDuration}\`\n\nRequested by: \`${song.user.tag}\``)
          .setThumbnail(`${song.thumbnail}`)
      ]
    })
  )
  .on('addList', (queue, playlist) =>
    queue.textChannel.send({
      embeds: [
        new Discord.EmbedBuilder()
          .setTitle(`Playlist added to the queue`)
          .setDescription(`\`${playlist.name}\` (${
            playlist.songs.length
          } songs)\n${status(queue)}\n\nRequested by: \`${song.user.tag}\``)
          .setThumbnail(`${song.thumbnail}`)
      ]
    })
  )
  .on('error', (channel, e) => {
    if (channel) channel.send(`An error encountered: ${e.toString().slice(0, 1974)}`)
    else console.error(e)
  })
  .on('empty', channel => channel.send('There is no one here. Im alone, again...'))
  .on('searchNoResult', (message, query) =>
    message.channel.send(`No result found for \`${query}\`!`)
  )
  .on('finish', queue => queue.textChannel.send("https://tenor.com/view/end-thats-all-folks-gif-10601784"))

client.on("ready", () => {
  client.user.setPresence({
      activities: [{
        name: 'AURORA',
        type: ActivityType.Listening
      }],
      status: "idle"
  })
})

client.login(process.env.TOKEN)


  


  It does come from my ffpmeg, I need to install one of these packages instead of the npm installation : https://github.com/BtbN/FFmpeg-Builds/releases

  


  How do I install it on a server (Vultr) ?